Apparatus for use in the manufacture of sheet-glass.



No. 679,705. Pafented July 30, 1901.

P. T. SIEVEBT & n. HEIKEL.

APPARATUS FOR USE IN THE MANUFACTURE OF SHEET GLASS.

(Applicafion filed Jan. 16, 1899.)

(Nu Model.)

35 showsia metal plate and metal roller covered 40 with {fibrousmaterial.

U ITED STATES PATENT OFFI PAUL THEOD'QR SIEVERT, F DRESDEN, AND ROBERTHEIKEL, OF DEUBEN, GERMANY; SAID HEIKEL-ASSIGNOR TO SAID SIEVERVT.

APPARATUS FOR uss lN T-I'HEMANUFACTURE OF SHEET-GLASS.

- srnctmcnfzrxon forming part of LettersPatent No. 679,705, dated July30, 190i.

Application filed January 16, 1899- Serial No. 702 ,309. memorial.)

To all whom; it may concern:

Be it known that we, PAUL THEODOR SIE- vE'R'r, residing atDresden, andROBERT HEI- K'EL,2residi-ng at Deuben, near Dresden, in the Empire'ofGermany, subjects of the King of Saxony, have invented a certain new anduse- 1 tel-ImprovementinApparatns for Use in the Manufacture ofjSjheet:Glass, (for which applications have been made for Letters Patent inGreat Brit-ain,filed December 22,1898; in Germany, filed August, 1898,and November 24, 1898; in France, filed October 31, 1898;-in Belgium,filed October 31, 1898;in Austria, filed December-l2, 1898, and inHungary, filed December',*-;1898,) of which the following is aspecification.

This inventiou'relates to a process for manufa'cturing sheet or plateglass by compression orrolling between surfaces of soft permeablematerial which allow water to pass through-such as paper, wood-pulp,asbestos, cellulose, &c.--as well as to apparatus for carrying saidprocess into eifect.

;The invention consists in the arrangement of solid or hollow metalplates and rollers the surface of which is covered by a soft permeablematerial, so that glass still in its plastic .moldabl'e state is broughtin contact with said fibrous material. a

The invention offers the advantage that glass plates rolled orcompressed between non=c0o1ing-fibrous substances become very smooth andtransparent andmay be made of a hitherto-unattainable thinness.

;Inthe accompanying drawings, Figure 1 with fibrous material. Fig. 2shows a hollow metal plate and hollow roller provided on the surfacewith perforations, both being covered Fig, 3 shows an in- .clined h llowmetal plate provided with a ffibrous, "vering and a series of smallrolls supported in a frame. Fig. 4 shows a hollow imetal plate with afibrous covering and a se- 5 ries of rolls of gradually-increasingdiameter. Fig. 5 shows two rolls covered with fibrous Y material servingto roll a mass of plastic glass into a plate or sheet and deposit it ona plate 1 also covered with fibrous material. Fig. 6 5c" shows two pairsof rolls, the rollers of each pair being arranged at diiferent distancesmany cases the cool temperature of the metal .It is in some casesadvantageous to arrange apart, in combination with a plate for the samepurpose as in the preceding figure.

In Fig. 1, a is a solid metal-plate on which is placed a thin layer orcovering b, of fibrous material. The roller 0' is also provided with afibrous layer d. When manufacturing glass plates, the molten mass ofglassor a glass plate which has been subjected to preliminary rolling orpressing'isplaced on the plate a. In

will be sufficient to prevent the burning of the fibrous layers b d,more particularly when the metallic parts covered by them are hollow, sothat they may be continually cooled by water, steam, air, 850.; but itis advisable to moisten the fibrous layers b d with water or othercooling liquid, so that at first the liquid is vaporized and at the sametime or after evaporation has stopped the cooling temperature of themetal surfaces comes into play. The moistening of the fibrous layers maybe conveniently effected by'providing the metal plates and rollers withrecesses or hollow spaces e, from which passages or perforations f, Fig.2, extend to the surface on which the fibrous material is placed, whichare thus supplied from within with water or steam for the purpose ofmoistening the fibrous materiaL, The latter is preferably used in theshape of a fabric secured to the metal surface a. by means of a frame orclamp g. a

On the contact of the moist fibrous layers with the glass air-bubblesare often formed in the glass, and in order to get rid of them there isarranged according to this invention aseries of small rollers 0,supported in a frame and employed to roll the glass until it losesitsplasticity by cooling. Instead of one or two large rolls,as hithertoused, there are in this case six to eight small rolls, which are allsimultaneously in contact with themass or sheet of glass, so that thecontact takes place successively (in point of space) at short distancesapart, and the glass plate is continually worked, so that a bubble orblow-hole that may be formed is at once destroyed by the next roll,until the glass is cooled to such an extent that no more bubbles can beproduced.

the metal plates used as a rolling-table in an inclined position, (shownin Fig. 3,) so as to cause the glass to press against the rolls by theinfluence of its own weight.

As shown in Fig; 4, the rolls combined in the frame h may be arranged ina graduallypossible hitherto.

ing is effected by means of a plate and rolls it is advisable to pourout the hot molten mass of glass. first on a bare metal plate adjoiningthat covered with fibrous material and then to roll it over onto thelatter. In this way the glass slightly cools before reaching the fibrousmaterial, which is thus protected from injury.

The process, in itself well known, of pouring glass between two rotatingrolls, Fig. 5, which roll it into a'plate and deposit on a plate a, maybealso employed. The rolls 0, as well as the plate a, are also coveredwith a su'r face layer b, of fibrous material.

Several pairs of rolls 0 c at diiferent distances apart may be arranged,Fig. 6, in order gradually to roll the glass plate thinner and thinnerand to deliver it on the plate a,

In all the cases described in which the workthe glass coming in contactonly with the fibrous layer b. e

A pair of non-covered metallic rolls may be used over the rolls a,'covered with fibrous material, so as to cool the glass slightly beforeallowing it to come in contact with the fibrous. surfaces.

We claim- 1. The combination of two coacting surfaces between whichmolten glass is adapted to be placed and by which said glass issubjected to pressure and a fibrous covering on 45 the coacting faces ofsaid surfaces each of said surfaces being constructed to permit a liquid.or. steam tobe brought incontact with the covering from the under sideof the latter.

2. The combination of two coacting hollow bodies, having perforationsextending from the interior tot-he outer surfaces,an'd a fibrous.covering on the opposing'faces of said bodies."

I 3. The combination-ofa perforated plate, covered with fibrousmaterial, with aseries-of' rolls of diflerentdiameterssupported one behind another in a frame substantially as de- SCIib6d.' 3' -l 3-,. "I

In testimony whereof we have-heretov set our hands in the-presence ofthetwo subscrib- 6o ing Witnesses.

' PAUL THEODOR SIEVERT.

ROBERT HEI'KEL. Witnesses:

HERNANDO' DE SoTo,

RUDOLF SCHMIDT. Y

